/// <summary>
/// Called once per frame, the call is the entry point for
/// animating the scene.
/// </summary>
public void FrameMove()
{
lightData = device.LightsFixed[2];
// Rotate through the various light types
if (((int)appTime % 20) < 10)
{
device.LightsFixed[2].Type = LightType.Point;
}
else
{
device.LightsFixed[2].Type = LightType.Directional;
}
// Make sure the light type is supported by the device. If
// VertexProcessingCaps.PositionAllLights is not set, the
// device does not support point or spot lights, so change
// light #2's type to a directional light.
if
(!device.DeviceCaps.VertexProcessingCaps.SupportsPositionalLights)
{
if (device.LightsFixed[2].Type == LightType.Point)
{
device.LightsFixed[2].Type = LightType.Directional;
}
}
// Values for the light position, direction, and color
float x = (float)Math.Sin(appTime * 2.000f);
float y = (float)Math.Sin(appTime * 2.246f);
float z = (float)Math.Sin(appTime * 2.640f);
byte r = (byte)((0.5f + 0.5f * x) * 0xff);
byte g = (byte)((0.5f + 0.5f * y) * 0xff);
byte b = (byte)((0.5f + 0.5f * z) * 0xff);
device.LightsFixed[2].DiffuseColor =
ColorValueFixed.FromColor(System.Drawing.Color.FromArgb(r,
g, b));
device.LightsFixed[2].Range = 100.0f;
switch (device.LightsFixed[2].Type)
{
case LightType.Point:
device.LightsFixed[2].Position =
new Vector3Fixed(4.5f * x, 4.5f * y, 4.5f * z);
device.LightsFixed[2].Attenuation1 = 0.4f;
break;
case LightType.Directional:
device.LightsFixed[2].Direction =
new Vector3Fixed(x, y, z);
break;
}
device.LightsFixed[2].Update();
}
/// <summary>
/// The device exists, but may have just been Reset(). Resources
/// and any other device state that persists during
/// rendering should be set here. Render states, matrices, textures,
/// etc., that don't change during rendering can be set once here to
/// avoid redundant state setting during Render() or FrameMove().
/// </summary>
void RestoreDeviceObjects(System.Object sender,
System.EventArgs e)
{
MyVertex[] v;
Mesh pWallMeshTemp = null;
// Create a square grid numberVertsX*numberVertsZ for
// rendering the wall
pWallMeshTemp = new Mesh(numberTriangles, numberTriangles * 3,
0, MyVertex.Format, device);
// Fill in the grid vertex data
v = (MyVertex[])pWallMeshTemp.VertexBuffer.Lock(0,
typeof(MyVertex), 0, numberTriangles * 3);
float dX = 1.0f / (numberVertsX - 1);
float dZ = 1.0f / (numberVertsZ - 1);
uint k = 0;
for (uint z = 0; z < (numberVertsZ - 1); z++)
{
for (uint x = 0; x < (numberVertsX - 1); x++)
{
v[k].p = new Vector3(10 * x * dX, 0.0f, 10 * z * dZ);
v[k].n = new Vector3(0.0f, 1.0f, 0.0f);
k++;
v[k].p = new Vector3(10 * x * dX, 0.0f, 10 * (z + 1) * dZ);
v[k].n = new Vector3(0.0f, 1.0f, 0.0f);
k++;
v[k].p = new Vector3(10 * (x + 1) * dX, 0.0f, 10 * (z + 1) * dZ);
v[k].n = new Vector3(0.0f, 1.0f, 0.0f);
k++;
v[k].p = new Vector3(10 * x * dX, 0.0f, 10 * z * dZ);
v[k].n = new Vector3(0.0f, 1.0f, 0.0f);
k++;
v[k].p = new Vector3(10 * (x + 1) * dX, 0.0f, 10 * (z + 1) * dZ);
v[k].n = new Vector3(0.0f, 1.0f, 0.0f);
k++;
v[k].p = new Vector3(10 * (x + 1) * dX, 0.0f, 10 * z * dZ);
v[k].n = new Vector3(0.0f, 1.0f, 0.0f);
k++;
}
}
pWallMeshTemp.VertexBuffer.Unlock();
// Fill in index data
ushort[] pIndex;
pIndex = (ushort[])pWallMeshTemp.IndexBuffer.Lock(0,
typeof(ushort), 0, numberTriangles * 3);
for (ushort iIndex = 0; iIndex < numberTriangles * 3; iIndex++)
{
pIndex[iIndex] = iIndex;
}
pWallMeshTemp.IndexBuffer.Unlock();
// Eliminate redundant vertices
int[] pdwAdjacency = new int[3 * numberTriangles];
pWallMeshTemp.GenerateAdjacency(0.01f, pdwAdjacency);
// Optimize the mesh
wallMesh = pWallMeshTemp.Optimize(MeshFlags.OptimizeCompact |
MeshFlags.OptimizeVertexCache | MeshFlags.VbDynamic |
MeshFlags.VbWriteOnly, pdwAdjacency);
pWallMeshTemp = null;
pdwAdjacency = null;
// Create sphere and cone meshes to represent the lights
sphereMesh = Mesh.Sphere(device, 0.25f, 8, 8);
coneMesh = Mesh.Cylinder(device, 0.0f, 0.25f, 0.5f, 8, 8);
// Set up a material
Microsoft.WindowsMobile.DirectX.Direct3D.Material mtrl =
new Material();
mtrl.Ambient = mtrl.Diffuse = System.Drawing.Color.White;
device.Material = mtrl;
// Set miscellaneous render states
device.RenderState.DitherEnable = false;
device.RenderState.SpecularEnable = false;
device.TextureState[0].ColorOperation = TextureOperation.Disable;
device.TextureState[0].AlphaOperation = TextureOperation.Disable;
// Set the world matrix
MatrixFixed matIdentity = MatrixFixed.Identity;
device.Transform.WorldFixed = matIdentity;
// Set the view matrix.
MatrixFixed matView;
Vector3 vFromPt = new Vector3(-10, 10, -10);
Vector3 vLookatPt = new Vector3(0.0f, 0.0f, 0.0f);
Vector3 vUpVec = new Vector3(0.0f, 1.0f, 0.0f);
matView = new MatrixFixed(Matrix.LookAtLH(vFromPt, vLookatPt,
vUpVec));
device.Transform.ViewFixed = matView;
// Set the projection matrix
MatrixFixed matProj;
float fAspect =
((float)device.PresentationParameters.BackBufferWidth) /
device.PresentationParameters.BackBufferHeight;
matProj = new MatrixFixed(
Matrix.PerspectiveFovLH((float)Math.PI / 4, fAspect, 1.0f,
100.0f));
device.Transform.ProjectionFixed = matProj;
// Turn on lighting.
device.RenderState.Lighting = true;
// Enable ambient lighting to a dim, grey light, so objects that
// are not lit by the other lights are not completely black
device.RenderState.Ambient = System.Drawing.Color.Gray;
// Set light #0 to be a simple, faint grey directional light so
// the walls and floor are slightly different shades of grey
device.LightsFixed[0].Type = LightType.Directional;
device.LightsFixed[0].Direction = new Vector3Fixed(0.3f, -0.5f,
0.2f);
device.LightsFixed[0].DiffuseColor =
ColorValueFixed.FromColor(System.Drawing.Color.FromArgb(64,
64, 64));
device.LightsFixed[0].Update();
// Set light #1 to be a simple, bright directional light to use
// on the mesh representing light #2
device.LightsFixed[1].Type = LightType.Directional;
device.LightsFixed[1].Direction =
new Vector3Fixed(0.5f, -0.5f, 0.5f);
device.LightsFixed[1].DiffuseColor =
ColorValueFixed.FromColor((System.Drawing.Color.Blue));
device.LightsFixed[1].Update();
// Light #2 will be the light used to light the floor and
// walls. It will be set up in FrameMove() since it changes
// every frame.
}
